Using WordPress ‘get_the_author_yim()’ PHP function
Retrieve the Yahoo! IM name of the author of the current post.
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Using WordPress ‘get_the_author_posts()’ PHP function
Retrieves the number of posts by the author of the current post.
Using WordPress ‘get_the_author_meta()’ PHP function
Retrieves the requested data of the author of the current post.
Using WordPress ‘get_the_author_nickname()’ PHP function
Retrieve the nickname of the author of the current post.
Using WordPress ‘get_the_author_posts_link()’ PHP function
Retrieves an HTML link to the author page of the current post’s author.
Using WordPress ‘get_the_author_url()’ PHP function
Retrieve the URL to the home page of the author of the current post.
Using WordPress ‘get_the_category_rss()’ PHP function
Retrieves all of the post categories, formatted for use in feeds.
Using WordPress ‘get_the_category_by_ID()’ PHP function
The `get_the_category_by_ID()` function retrieves a category's name from its ID in WordPress
Using WordPress ‘is_avatar_comment_type()’ PHP function
Check if this comment type allows avatars to be retrieved.